The Anti-Blocked Safety Firing Head Technological Research

2017 ◽  
Vol 865 ◽  
pp. 118-124
Author(s):  
Feng Wang ◽  
Tao Ma ◽  
Fang Fang Jiang ◽  
Cheng Wen Lei
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Simulation Model ◽  
Low Cost ◽  
Field Application ◽  
Structure Design ◽  
Key Technology ◽  
Technological Research

In this paper, ANSYS-LSDYNA is used to establish the numerical simulation model of the blocked collision and the blocked hazard is analyzed in the process of putting the oil perforating string into downhole. According to the analysis results, the anti-blocked safety firing head is designed and the key technology is carried on the structure design and the experimental study [1]. The field application proved that this technology can effectively eliminate the potential hazards of mistaken perforating caused by sliding, falling objects, etc. It’s safety, reliable, and low cost.

Lab Testing and Finite Element Method Simulation of Hole Deflector Performance for Radial Jet Drilling

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Bin Wang ◽  
Gensheng Li ◽  
Zhongwei Huang ◽  
Tianqi Ma ◽  
Dongbo Zheng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Low Cost ◽  
Geometric Model ◽  
Frictional Resistance ◽  
Finite Element Method Simulation ◽  
Optimization Method ◽  
Structure Design ◽  
Coal Bed ◽  
Factors Affecting ◽  
High Pressure Water Jet

Radial jet drilling (RJD) is an efficient approach for improving the productivity of wells in low permeability, marginal and coal-bed methane (CBM) reservoirs at a very low cost. It uses high-pressure water jet to drill lateral holes from a vertical wellbore. The length of the lateral holes is greatly influenced by the frictional resistance in the hole deflector. However, the hole deflector frictional resistance and structure design have not been well studied. This work fills that gap. Frictional resistances were measured in a full-scale experiment and calculated by numerical simulation. The structure of the hole deflector was parameterized and a geometric model was developed to design the hole deflector track. An empirical model was then established to predict the frictional resistance as a function of the hole deflector structure parameters and an optimization method for designing the hole deflector was proposed. Finally, four types of hole deflectors were optimized using this method. The results show good agreement between the numerical simulation and the experimental data. The model error is within 11.6%. The bend radius R and exit angle β are the key factors affecting the performance of the hole deflector. The validation test was conducted for a case hole deflector (5½ in. casing). The measured frictional resistance was decreased from 31.44 N to 23.16 N by 26.34%. The results from this research could serve as a reference for the design of hole deflectors for radial jet drilling.

scholarly journals Numerical Simulation and Experimental Study on Liquid Holding Capacity of Eeddy Current Tools

2021 ◽  
Vol 299 ◽  
pp. 03009
Author(s):  
Xiaolei Du ◽  
Jihong Tian ◽  
Fengsheng Yao
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Eddy Current ◽  
Helix Angle ◽  
Gas Production ◽  
Field Application ◽  
Optimal Structure ◽  
Gas Recovery ◽  
Wing Width ◽  
Fluent Software

In view of the problems existing in the field application of eddy current tools, the research on eddy current tools drainage gas recovery was carried out.Based on Fluent software and ground experiments, the optimal structure size of the eddy current drainage gas production tool is determined as follows: the wing height of the helix is 1.5mm, the diameter of the helix is 50mm, the wing width of the helix is 2mm, and the helix Angle is 55°, which provides reference for field application.

Stability Experimental Study on High Temperature and Oxygen-Containing Flue Gas

2012 ◽  
Vol 512-515 ◽  
pp. 1307-1310
Author(s):  
Wu Qi Wen ◽  
Shi Ping Jin ◽  
Su Yi Huang ◽  
Shun Li Fang ◽  
Xi Lai Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Flue Gas ◽  
Low Cost ◽  
Calorific Value ◽  
Marginal Effect ◽  
Pyrolysis Process ◽  
Key Technology ◽  
The Stability ◽  
Generation Rule

During lignite pyrolysis process, there will produce large amounts of gas which is low calorific value, combustion difficult. This paper creatively put forward a program: high temperature and oxygen-containing flue gas of coal-fired mix combustion with low calorific value gas. Compared to mixing high calorific value fuel, the distinguishing feature of this program is ultra-low cost, and technically feasible. In this scheme, the stability of high-temperature and oxygen-containing flue gas is key technology. Through coal-fired experiments, we obtained generation rule of high-temperature and oxygen-containing flue gas, and summed up a diminishing marginal effect.

Fundamental Examination of Numerical Simulation Model for Pressure Rise due to Underwater Arc

2014 ◽  
Vol 134 (7) ◽  
pp. 604-613 ◽  
Author(s):  
Toshiya Ohtaka ◽  
Tomo Tadokoro ◽  
Masashi Kotari ◽  
Tadashi Amakawa
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Pressure Rise

Evaluation of an improvement in runoff control by means of a construction of an infiltration sewer pipe under a porous asphalt pavement

1997 ◽  
Vol 36 (8-9) ◽  
pp. 397-402
Author(s):  
Yasuhiko Wada ◽  
Hiroyuki Miura ◽  
Rituo Tada ◽  
Yasuo Kodaka
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Asphalt Pavement ◽  
Considerable Effect ◽  
Rainfall Infiltration ◽  
Sewer Pipe ◽  
Porous Asphalt ◽  
Runoff Control

We examined the possibility of improved runoff control in a porous asphalt pavement by installing beneath it an infiltration pipe with a numerical simulation model that can simulate rainfall infiltration and runoff at the porous asphalt pavement. From the results of simulations about runoff and infiltration at the porous asphalt pavement, it became clear that putting a pipe under the porous asphalt pavement had considerable effect, especially during the latter part of the rainfall.

scholarly journals Numerical simulation on coal loading process of shearer drum based on discrete element method

2021 ◽  
pp. 014459872110135
Author(s):  
Zhen Tian ◽  
Shuangxi Jing ◽  
Lijuan Zhao ◽  
Wei Liu ◽  
Shan Gao
Keyword(s):  
Numerical Simulation ◽  
Discrete Element Method ◽  
Loading Rate ◽  
Low Cost ◽  
Element Model ◽  
Discrete Element ◽  
Helix Angle ◽  
Loading Process ◽  
Coal Particles ◽  
Element Method

The drum is the working mechanism of the coal shearer, and the coal loading performance of the drum is very important for the efficient and safe production of coal mine. In order to study the coal loading performance of the shearer drum, a discrete element model of coupling the drum and coal wall was established by combining the results of the coal property determination and the discrete element method. The movement of coal particles and the mass distribution in different areas were obtained, and the coal particle velocity and coal loading rate were analyzed under the conditions of different helix angles, rotation speeds, traction speeds and cutting depths. The results show that with the increase of helix angle, the coal loading first increases and then decreases; with the increase of cutting depth and traction speed, the coal loading rate decreases; the increase of rotation speed can improve the coal loading performance of drum to a certain extent. The research results show that the discrete element numerical simulation can accurately reflect the coal loading process of the shearer drum, which provides a more convenient, fast and low-cost method for the structural design of shearer drum and the improvement of coal loading performance.

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